<template>
  <div class>
    <!-- 面包屑 -->
    <breadcrumb>
      <span slot="main">商品管理</span>
      <span slot="main_a">添加商品</span>
    </breadcrumb>
    <!-- 卡片 -->
    <el-card>
      <!-- 提示区 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!-- 步骤条 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                expand-trigger="hover"
                :options="catelist"
                :props="cateProps"
                v-model="addForm.goods_cat"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的Item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- 上传图片 -->
            <el-upload
              class="upload-demo"
              :action="uploadURl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编译器组件 -->
            <quill-editor v-model="addForm.goods_intriduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
          <el-tab-pane label="完成" name="5">完成</el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
// 设置深拷贝模块
import _ from 'lodash'
export default {
  name: 'MyComponent',
  props: {},
  data() {
    return {
      // 实现步骤条与tab栏的联动效果
      activeIndex: '0',
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片的数组
        pics: [],
        // 商品的详情描述
        goods_intriduce: '',
        //
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ]
      },
      // 商品分类列表
      catelist: [],
      //   级联选择器
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      //   动态参数列表数据
      manyTableData: [],
      //    静态属性列表数据
      onlyTableData: [],
      //   图片上传地址
      uploadURl: 'http://127.0.0.1:8888/api/private/v1/upload',
      //   图片上传组件的headers 请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      //
      previewPath: '',
      previewVisible: false
    }
  },
  //   计算属性
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      let res = await this.$axios.get('categories')
      //   console.log(res)
      if (res.data.meta.status !== 200) {
        return this.$message.error('获取商品分类失败！')
      }
      this.catelist = res.data.data
      this.$message.success('获取商品分类成功！')
    },
    // 级联选择器选中项，才触发的函数
    handleChange() {
      // console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length != 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave(activeName, odlActiveName) {
      //   console.log('离开', activeName)
      //   console.log('进入', odlActiveName)
      if (odlActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    // 参数获取
    async tabClicked() {
      //   console.log(this.activeIndex)
      if (this.activeIndex === '1') {
        let res = await this.$axios.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'many' } }
        )
        // console.log(res)
        if (res.data.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败！')
        }
        res.data.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data.data
      } else if (this.activeIndex === '2') {
        let res = await this.$axios.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'only' } }
        )
        // console.log(res)
        if (res.data.meta.status !== 200) {
          return this.$message.error('获取静态属性失败！')
        }
        // console.log(res.data.data)
        this.onlyTableData = res.data.data
      }
    },
    // 处理图片的预览效果
    handlePreview(file) {
      // console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理图片的移除操作
    handleRemove(file) {
      // console.log(file)
      // 1.获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2.从 pics 数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      // 调用数组的splice方法，把图片信息对象，从pics数组中移除
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      // console.log(response)
      // 拼接得到一个信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 将图片信息对象push到数组中
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm)
    },
    //添加商品
    add() {
      // 进行填写内容的校验
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('填写必要的表单项！')
        }
        //处理成字符串前进行数据的深拷贝
        const form = _.cloneDeep(this.addForm)

        // 执行添加的业务逻辑
        form.goods_cat = form.goods_cat.join(',')
        // console.log(form)

        // 1.处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            // 因为只接收字符串，则用空格隔开
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 2.处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // console.log(form)

        // 发起请求添加商品
        let res = await this.$axios.post('goods', form)
        // console.log(res)

        if (res.data.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
      })
      // console.log(this.addForm)
    }
  }
}
</script>

<style scoped lang='less'>
.el-steps {
  margin-top: 15px;
}
.el-tabs {
  margin-top: 15px;
}
.el-checkbox {
  margin: 0 10px 0 0 !important ;
}
.previewImg {
  width: 100%;
}
// 在父组件中去设置子组件的样式，加上/deep/ 实现穿透功能
/deep/ .ql-editor {
  height: 600px;
}
/deep/ .ql-toolbar.ql-snow {
  padding: 0 8px;
}
.btnAdd {
  margin-top: 15px;
}
</style>
